[jira] Assigned: (LUCENE-776) Use WeakHashMap instead of Hashtable in FSDirectory

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless reassigned LUCENE-776:
-----------------------------------------

    Assignee: Michael McCandless

> Use WeakHashMap instead of Hashtable in FSDirectory
> ---------------------------------------------------
>
>                 Key: LUCENE-776
>                 URL: https://issues.apache.org/jira/browse/LUCENE-776
>             Project: Lucene - Java
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Nicolas Lalevée
>         Assigned To: Michael McCandless
>            Priority: Trivial
>
> I was just reading the FSDirectory java code, then I found this :
>   /** This cache of directories ensures that there is a unique Directory
>    * instance per path, so that synchronization on the Directory can be used to
>    * synchronize access between readers and writers.
>    *
>    * This should be a WeakHashMap, so that entries can be GC'd, but that would
>    * require Java 1.2.  Instead we use refcounts...
>    */
>   private static final Hashtable DIRECTORIES = new Hashtable();
> Since Lucene is now requiring at least 1.2 (for ThreadLocal for instance, which is using BTW some WeakHashMap), maybe it is time to change ?

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